Fast Time-Space Tracking of Smoothly Moving Fine Structures in Image Sequences.
Résumé
We address the problem of temporal tracking fine point-like and filamentary structures exhibiting smooth motions in \mbox{image} sequences. By taking these specific restrictions into account, we propose an original tracking method based on the search for integral lines in time-space structure tensor fields. The method appears to be simple and very efficient \mbox{regarding} computation time and tracking precision, allowing a sub-pixel accuracy in both spatial and temporal domains. We suggest a numerical implementation of the algorithm based on a modified constrained Runge-Kutta scheme. The performance and potential applicability of our algorithm is illustrated with two real cases : the tracking of internal linear features in composite materials observed with X-rays and the tracking of granular-shaped objects moving in a gas flow.
Domaines
Traitement des images [eess.IV]
Origine : Fichiers produits par l'(les) auteur(s)
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